Avoid use-after-free in QXcbConnection::initializeScreens()

Origin: upstream, https://code.qt.io/cgit/qt/qtbase.git/commit/?id=86b8c5c3f32c2457
Last-Update: 2020-11-23

Gbp-Pq: Name xcb_screens_uaf.patch

qtbase-opensource-src (5.15.2+dfsg-10+rpi1) bookworm-staging; urgency=medium

  [changes introduced in 5.6.1+dfsg-2+rpi1] by Peter Michael Green]
  * Partially fix clean target.

  [changes introduced in 5.9.1+dfsg-9+rpi1 by Peter Michael Green]
  * Disable neon (-no-neon no longer seems to work, so edit configure.json instead)

[dgit import unpatched qtbase-opensource-src 5.15.2+dfsg-10+rpi1]

Import qtbase-opensource-src_5.15.2+dfsg-10+rpi1.debian.tar.xz

[dgit import tarball qtbase-opensource-src 5.15.2+dfsg-10+rpi1 qtbase-opensource-src_5.15.2+dfsg-10+rpi1.debian.tar.xz]

Import qtbase-opensource-src_5.15.2+dfsg.orig.tar.xz

[dgit import orig qtbase-opensource-src_5.15.2+dfsg.orig.tar.xz]